Cardiac Localization System Using Rotated Coordinate Axes
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Solution Overview
Problem
Current methods for localizing cardiac arrhythmias are imprecise, leading to limited success in diagnosis and treatment.
Innovation Solution
A localization system comprising a catheter with biopotential electrodes, a patient interface module with localization electrodes, and a cardiac information console that processes signals to establish a coordinate system for accurate electrode orientation and cardiac mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional localization methods are used, then the system is simple, but the measurement precision is insufficient for accurate arrhythmia localization
Solution Approach 1:
The system divides the localization task into multiple components: body surface electrodes for initial mapping, intracardiac catheter electrodes for detailed measurement, and a coordinate system for spatial reference. Each component contributes to the overall precision without requiring all components to be present simultaneously, allowing incremental improvement of localization accuracy.
Solution Approach 2:
The system transitions from two-dimensional body surface mapping to three-dimensional intracardiac localization by deploying catheter electrodes within the heart chambers. This dimensional transition enables precise spatial mapping of arrhythmia origins by measuring potentials at multiple depths and angles within the cardiac structure.
2Measurement precision
If multiple electrodes are used to improve localization accuracy, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The catheter assembly serves multiple functions: it provides structural support for electrode deployment, establishes spatial coordinate references through its geometric configuration, and enables electrical potential measurement. This multi-functionality reduces the need for separate devices for each task, managing complexity while improving precision.
Solution Approach 2:
The catheter acts as an intermediary structure that bridges the body surface and intracardiac space. It carries electrodes from the external environment into the heart chambers, providing a stable platform for precise electrode positioning and signal acquisition without requiring direct surgical access to the cardiac tissue.
3Stability of the object's composition
If a fixed coordinate system is established for electrode orientation, then the measurement consistency improves, but the adaptability to different cardiac geometries decreases
Solution Approach 1:
The coordinate system is defined by the physical geometry of the catheter assembly, which can be positioned and oriented dynamically within different cardiac chambers. The system adapts to various cardiac anatomies by adjusting the catheter's spatial configuration while maintaining a consistent reference frame for electrode potential measurements relative to the catheter's own geometry.
Data Source
AI summary
Provided are a localization system and method useful in the acquisition and analysis of cardiac information. The localization system and method can be used with systems that perform cardiac mapping, diagnosis and treatment of cardiac abnormalities, as examples, and in the retrieval, processing, and interpretation of such types of information. The localization system and method use high impedance inputs, improved isolation, and relatively high drive currents for pairs of electrodes used to establish a multi-axis coordinate system. The axes can be rotated and scaled to improve localization.